Exercise guide
Dumbbell Single Arm Shrug
- Intermediate
- Isolation
- Rep-based
- Shoulders
This unilateral variation targets the upper trapezius to build neck and upper back thickness while allowing for a greater range of motion and correcting muscle imbalances.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Stand with your feet shoulder-width apart and hold a dumbbell in one hand with a neutral grip (palm facing your thigh).
- Keep your arm straight and let the weight hang naturally at your side.
- Place your non-working hand on your hip or hold onto a stable rack for balance.
- Engage your core and maintain a tall, upright posture with your chest out.
How to do it
- Exhale as you elevate your shoulder straight up toward your ear as high as possible without bending your elbow.
- Squeeze the trapezius muscle at the top of the movement for a one-second pause.
- Inhale as you slowly lower the dumbbell back to the starting position under full control.
- Complete all reps on one side before switching to the other arm.
Form checklist
- Keep the arm straight; do not use the biceps to lift the weight.
- Move the shoulder vertically; avoid rolling the shoulders in a circular motion.
- Keep your head and neck neutral; do not tilt your head toward the shoulder.
- Avoid using your legs or torso to 'bounce' the weight up.
Pro tips
- Slightly lean your torso toward the side holding the dumbbell to put the trapezius fibers in a more direct line of pull.
- Imagine trying to touch your shoulder to your ear while keeping your chin tucked to maximize the peak contraction.
Make it harder
- Incorporate a 3-second isometric hold at the peak of the contraction.
- Perform the eccentric (lowering) phase over a 3-4 second count to increase time under tension.
Frequently asked
- What muscles does the dumbbell single arm shrug work?
- The dumbbell single arm shrug primarily targets the trapezius.
- What equipment do you need for the dumbbell single arm shrug?
- The dumbbell single arm shrug uses dumbbell.
- Is the dumbbell single arm shrug good for beginners?
- The dumbbell single arm shrug is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.